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From "David Fradin (JIRA)" <>
Subject [jira] (MNG-5491) Resolve artifact failed because of using repo url instead of repo ID
Date Thu, 04 Jul 2013 07:44:05 GMT
David Fradin created MNG-5491:

             Summary: Resolve artifact failed because of using repo url instead of repo ID

                 Key: MNG-5491
             Project: Maven 2 & 3
          Issue Type: Bug
          Components: Artifacts and Repositories
    Affects Versions: 3.0.5
         Environment: On several systems as Linux Redhat and Windows Vista
            Reporter: David Fradin
         Attachments: settings.xml

We have develop a MOJO that downloads a list of artefacts and makes that operations on them.
It works in Maven 3.0.3 but failed in Maven 3.0.5 on resolveArtifact method. It seems to be
a regression on Maven 3.0.5 (we don't test on Maven 3.0.4).

In attached file, find our settings.xml (we have remove internal information).
You can see we have a plugin repository ID and a repository ID that use the same URL repository.

When we use our plugin, Maven downloads its dependencies and for example download
(it makes the same problem on all common artifacts).
On local repository, we can see in
cat repository/javax/xml/stream/stax-api/1.0-2/_maven.repositories :
#NOTE: This is an internal implementation file, its format can be changed without prior notice.
#Wed Jul 03 13:30:47 CEST 2013

Then Maven execute our plugin that has to download a list of artifacts.
But it failed to download 

Reason is that is present on local repository, so it found
by Maven but when it tests if it is up-to-date it failed because this file comes from another

Explanation :
Class : DefaultArtifactResolver
Method : private List<ArtifactResult> resolve( RepositorySystemSession session,
                                          Collection<? extends ArtifactRequest> requests
Class : DefaultUpdateCheckManager
Method :    public void checkArtifact( RepositorySystemSession session, UpdateCheck<Artifact,
ArtifactTransferException> check )
	if ( isAlreadyUpdated( session.getData(), updateKey ) )
updateKey contains repository.getUrl() and not repository.getID()
So isAlreadyUpdated answers yes because artefact as already been downloaded from this URL.

But when Maven reads _maven.repositories, it sees that repository ID public-repository is
not here so the plugin is considered as unavailable.

So we have an artifact that is present in local repository but considered as unavailable by
resolve and present by isAlreadyUpdated. 
So artifact is never updated so the repository ID is not added to _maven.repositories

Is it clear ?
I hope...

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